Improvement in machines for finishing horseshoe-nails



2 Shee-ts--Sheet I.

A. D. BiNGl-IAM. Machines for Finishing Horseshoe-Nails. 910,149,185, Patented March 31,1874.

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2Sheets--Sheet2- A. D. BING'HAM.

Machines for Finishing Horseshoe-Nails. N0.i49,i85, Patented March 31,1874.

WITNESSES.

UNITED STATES;

PATENT OFFICE.

ALBERT'D. BINGHAM, OF NASHUA, NEV HAMPSHIRE, ASSIGNOR TO HIM- SELF AND .BELDIN D. BINGHAM, OF SAME PLACE.'

Specilication forming part of Letters Patent No. 149,l85, dated March 3l, 1874; application iilrd April 24, 1873.

To all whom it may concern:

Be it known that I, ALBERT D. BINGHAM, of Nashua, in the county of Hillsborough and State of N ew Hampshire, have invented a new and valuable Improvement in Horseshoe-Nail Pointer and Stiifener; and I do hereby declare that the following is a full, clear, and exact description of the construction and operation of the saine, reference being had to the annexed drawings making a part oflthis specication, and to the letters and figures of reference marked thereon.

Figure l of the drawing is a representation of a top view of my machine. Fig. 2 is a longitudinal vertical section of the same according to line :v x. Fig. 3 is a top view and a crossse'ction of an auxiliary implement. Fig. 4 is atop view of the back part of the machine with the-feeding apparatus removed. Fig. 5 is a view of the clamping apparatus of my machine.

The first part of my invention relates to an improved construction of the pistons, to which the swaging-dies and the shearing-dies and `punches are fastened, whereby the operator is Yenabled to multiply or reduce the number of nails simultaneously acted upon. The second part of my invention relates to an adjustable coupling of theswaging and shearing piston. The third part of my invention relates to the addition of a gridiron, in which the nail-blanks are placed in file to facilitate the operation of feeding the machine. y

A is a foundation-plate, to which the frame B is fastened, which supports the working end of the main shaft C by an arm, b, and journal- `box b1, and which has an auxiliary frame, B',

attached to it by a bolt, b2. The shaft C is provided with a crank-plate, C', which has a diametrical recess or groovefor the reception of an exchangeable plate, D, fastened thereto by set-screws d d and steady-pins d d. To the plate D the wrist-pin D is fastened, which conveys motion to the piston F by means of the connecting-rodE and pin E. Thesaid piston is of rectangular shape, and is embedded in .the frame B. It has a cover or bea-ring plate, F1, secured to frame B, with set-screws j' f f j',

and it has a steel plate or swaging-die, F2,

- gages the ratchet-teeth k on the feed-table K and thereby revolves the said table at interfastened to its face. This swaging-die F2 has a mate, F2, which is fastened to the frame B opposite to it. The piston F has a forked project-ion, j", which fits between two collars, g g,

on a connecting-rod, G, so that the connecting-rod may be turned lfor the purpose of adjustment of the stroke ofthe second piston H. The front end of the coimecting-rod G is provided with a slot for operation by a screwdriver, or an equivalent device. The other end of said connecting-rod is hollow and split, and is provided with inside screw-threads for the reception of the threaded end of a rod, G, which is connected to the piston H by a pin, g. The face of the piston H carries the punches h h securely fastened to it, and the matchingdie c' is fastened to an upright frame, I, attached to the frame B. JA revolving feedingtable, K, provided with upright ratchet-teeth 7c and horizontal rack-pins kris secured between the lower bearing-plate L and the upper bearing-plate M by an annular rim, k2. The plate L is fastened to the frame B by setscrews Z, and forms thereby the top bearing of the piston H. rlhe feeding-table K is surrounded by a cylinder, N, which is fastened to the frames B and B', and serves to keep the blank nails between the rack-teeth k. The upper and opposite parts of the feeding-table K and cylinder N are chamfered down, so as to form a groove of V shape, between which the heads ofthe nail-blanks are traveling with their shanks downward. The plateM is fastened to the plate L by a set-screw, I, and it is also provided with set-screws mm to adjust the wear on the rim k2 by pressure on the plate L. rllhe machinery for imparting motion to the feed-table K is secured to the plate M, and consists of a cam-plate, O, fastened'to an upright revolving shaft, o, and provided with an upright eccentric pin, o1, which engages a lever, P, on a fulcrum, p, for the purpose of operating a bolt, Q. Motion is received from the main shaft C and transferred by a system ot' wheels and shafts of any suitable construction to the upright shaft o, which, by means of the projection or cam o2 on the cam-plate O, en-

vals of such duration as is needed for the operation of swaging and trimming. said operation the table K is held stationary by the bolt Q, as at the same time the lever I) is relieved from the eccentric pin o1 and dra-wn by the tension of the spring pl toward the ratchet-teeth. It communicates the same motion, by aidof a connecting-rod, P', and pins p3 and p4, to the bolt Q, which is provided at the free end with a longitudinal slot, g, and a guide-pin, q', to steady its motion. The spring plis fastened with one end to the lever P in any suitable manner, and with the other end to a pin, p2, in the plate M. The head of the bolt Q is so shaped that it fits perfectly into the spaces between the teeth k.

The punch h on the piston H serves to force theshank of the nail through the die t'. For the head of the nail another punch, h1, is fastened to the same piston to suit the difference in the thickness of the head and that of the shank. There is room between the two abovementoned punches, and also a slot, h2, in the piston H, for the purpose of allowing free sway to a clamp, which holds the nails in position until they are struck by the punches h h1. The said clamp is operated by a combination of levers with a common fulerum, R, in the arm L of the frame B1. Motion is applied by an arm, h3, on the piston H, with the aid of a friction-roller, h4, to a lever, S, on the shaft It. The lever S is provided with an exchangeable bearing-plate, S, which receives the thrust of the roller h4. A spring, T, fastened to a pin, t, on the frame Bl with one end, and to the plate S with the other end, serves to keep the roller h4 and the plate S in contact, and causes the back motion of the lever S. Behind the lever S is another lever, U, swinging on the shaft It, which carries a serrated clamp-plate, a, on its end. This said lever receives motion from the lever S byineans of a pin, u', fastened to it and protruding through a slot, s, in the lever S. A spring, s1, fastened t0 the lever S, bears on the pin u', which is thereby pressed against a pin, 82, on the lever S. The roller h4 moves in an .elevation which causes the lever of action on the plate S to be considerably shorter than the lever of the clampplate u. Consequently the motion of the said clamp-plate is proportion ally faster, and it travels a greater distance than the piston H. For the same reason it arrives in the forward motion at the die t', in advance of the punches h hl, and with its tapered notches seizes a number of nails right before the openings in the diet' and holds them in the proper position until the punches h h1 give the final thrust, and so finish the shearing opera.- tion. After the clamp-plate u has arrived before the die t' its motion stops until the lever S has finished its forward motion and has moved so far back again that the pin s2 comes in contact with the lever U, at which instance both D urin levers, S and S1, move back simultaneously. The slot s has to be made of such length that the pin a will not touch its opposite end during the interrupted motion of the lever S. The shaft R may be supported at the other end by an additional arm, B2, fastened on the frame B1. The cylinder N has one opening for the admission of the piston F and another one for the `admission of the die i, which must be close to the rack-teeth 7c.

The operation of supplying the feed-table K with nailblanks may be greatly facilitated by the use of a gridiron, V, with parallel rods o, between which the nail-blanks maybe arranged in rows in the very position in which the oper ator wants to insert them between the rack teeth It". in the feeding-table K.

The nail-blanks are taken in succession from the gridiron and inserted into the groove between the feed-table K and the cylinder N, and they will settle themselves with their heads between the rack-teeth k', so that their shanks are exposed below the said teeth to their full length, and with their dat sides toward the center of the feed-table K. They are carried around by the motion above described until they are between the swaging-dies F2 F3, where they are swaged by the forward movement of the piston F, while the bolt Q keeps the table K stationary, in the manner described. After being' relieved from the swagingdies, they are carried to the shearing-die, where they are seized by the clamp-plate u and held rigidly against the apertures in the said die, until the punches h h1 force them through, whereby all irregularities in the shape of those blanks are cut away in passing the sharp edges of the said apertures, and the nails drop forth finished.

I am aware that a notched and intermittingl Trotating nail-carrvi1nr wheel a swao- .l c t c 7 :s

ing-die, and a trimming-die are not new, and, therefore, I do not claim invention thereof broadly. l

W'hat I claim as new, and desire to secure by Letters Patent, is

l. The combination'of the cam-plate O, le-

ver I), boltQ, and spring p', substantially as Y 

